Knockdown miter-box.



N 737,322] PATENTED AUG. 25, 1903, v

' A, 0. BIRGE.

KNOCKDOWN MITE-R BOX. 7 APPLICATION FILED JULY 17, 1902. v 7 10 30mm. 2 sums-sum 1. f

.w/mgsses; INVENTOI? .ATTOHNE YS.

No. 737,322. 'PATENTEDAUGQZS', 1 903., A. .0. BIRG'EJH KNOGKDOWN MITER BOX.

APPLICATION FILED JULY 1.7 1902. 7 N0 MODEL. 2 SHEETSSHEET 2.

INVENTQH flZva'n 6.301 6'.

ATTORNEYS.

WITNESSES:

' iatented August 25, 1903.

PATENT OFFICE.

ALVINC. BIRGE, OFOLEVELAND, OHIO.

f KN'OCKDOWN Ml-TER-BO-X.

SPECIFICATION forming part of Letters Patent No. 737,322, dated'August 25, 1903.

.l ipplication 518a July 17, 1902.

To a whom it may concern.- 7

' Be it known that I, ALVIN CJBIRGE, of East Cleveland, in the county of Ouyahoga and State of Ohio, have invented a new and useful Improvementin Knockdown Miter-Boxes, of which the following is a specification.

The object of my invention is to provide a miter-box of very simple and practical con-, struction which will permit any kind of a handsaw to be usedin the same and which may be easily and quickly taken down and. packed in convenient and compact form for transportation and as easily set up; and it consists in the novel construction and ar-, rangement of parts whereby the above results are obtained, as will be hereinafter fully described with reference to the drawings, in

which- Figure 1 is a view in perspective of my miter-box set up with an ordinary handsaw shown in dotted lines applied to the same.- Fig. 2- is a perspective view of the miter-box in its knockdown or folded condition for easy. transportation. Fig. 3 is an end view of the lower portion of the box, partly in section; Fig.'4, an underneath view. Figs. 5 and 6 are sectional details of the saw-guide G.

In the drawings, A represents the base of my box, and B the vertical back piece, which two parts are separably connected together.

0 O are two vertical metal standards having forks 0 near their lower ends, which'straddle or embrace the back piece B. The lower ends of standards 0 are slotted and secured by set-screw o to the legs a. The back piece is preferably made three-ply in wooden layers,

with the grain crossed to prevent warping and splitting, and is cut away at theupper edge about the middle and has a series of saw-kerfs cutin it at this point arranged at the various different angles for cutting them iters. The tops of the standards 0 are ,detachably connected by screws to a horizontal cross-bar D, arranged above and in the plane of the back piece 13. This cross-bar has a rigidly-projecting right-angular arm d, which carries the upper pivot for the swinging sawframe hereinafter described. On the bottom side of the base there is a segmental frame K, secured to the base by screws and carrying the lower pivot of the swinging saw-frame, the upper and lower pivots being concentric to the bottom of the base. frame has in its are a series of notches adapted v to be used with my miter-box. I dinary handsaw is shown in dotted lines, and

Serial N6.116,004. (No model.)

or in the same vertical line. This swinging saw-frame is composed of the upper horizontal bar E, the lower horizontal bar E, and

the two vertical side bars F F. The upper horizontal bar E is connected near its middle by the detachable pivot-pin d to the rigid arm 01 of cross-bar D, and the lower horizontal bar E is similarly connected at d near the middle to the segmental frame K, fixed to receive a spring-locking detent m, by which the swinging saw-frame may be locked at any position to establish the angle of the miter.

screws e the slots permitting a lateral adjustment of the bars F F, so as to widenthe frame within certain limits to adapt the miter-box to receive wider work.

The vertical bars F' F are double at each side and have on their inner faces longitudinal grooves'that receive the tongues 15 of the These saw-guides are 7 sliding saw-guides G. slotted vertically to receive the saw-blade and have each an enlarged opening g, Fig. 6, near its upper end, and this opening has an outlet at its upper end in the form of a continuation of the narrow slot. The larger opening 9 is designed to receive the rib or enlargement at the back of an ordinary miter-saw,

' which rib gives stiffness to the blade and also is adapted to receive a special clamp-bar, which permits any ordinary limberhands'aw Such an or- I is the clamp and stifiening-bar for the same. This bar is made in two parallel sections rig- 1 idly fixed together at one end a distance less than the thickness of the saw-blade and having at the other end offsets or bends 11 with slots or openingsjby which it is tightly clamped upon the back of the saw-blade. When so attached, this detachable clamp slides through the openings g.of the saw-' guides just as the stifiening-rib at the back of the miter-saw does. The'saw-guides G slide up and down in the oppositely-facing grooves of the vertical bars F, so as to allow K the saw to be raised or lowered and to feed itself down through the work.

This segmental -The vertical members F F of the saw-frame are detachably connected to the horizontal members E E by means of slots e e and set- To limit the downward movement of different thicknesses of saws so that they cannot descend any farther than the base A, an adjustable stop 19 is secured to the side of each standard F. This stop is a vertically-slotted bar hung on a pin at the side of each standard F and having at its lower end a lug b, that projects under the saw-clamp I or the rib of a miter-saw and prevents the saw from descending any farther. These stops may be adjusted at any desired height by set-screws b to adapt them to saws of different width, so that the teeth of any saw may be preventd from cutting into the base-board A.

To put any handsaw in the miter-box, the clamp I is first inserted lengthwise into the openings g of the saw-guide, the saw then inserted, its teeth adjusted to a level, and the clamp then rigidly fixed to the saw by tightening the screws at This feature of my invention saves the expense of buying a saw with the miter-box and renders the latter not only much cheaper, but also lighter and easier to carry.

To hold the saw up while putting in the work, a vertical slot a is formed in the end of bar E, into which the blade of the saw may be jammed, so as to hold it up and leave the hands free to adjust the work.

To hold the work in my miter-box, there are a series of transverse grooves a in the top of the base A, in which there slides two or more bars H, bearing upright pins h, which press against the side of the work and are held tight by a clamp-screw h, working in a box it and bearing against the bar that carries the pin h. This also permits me to drift for odd cuts to corresponding cuts, to which box is set. There is also a longitudinal groove in the bed A, in which slides a gage-bar G, bearing a stop-lug 9, against which the work is made to abut endwise to limit the distance of the cut from the end of the board or molding on which the miter is to be cut. This bar is held to its adjustment by binding-screws s, Fig. 4. This bar G, with its upwardly-projecting lug or pin, is reversible to different ends of the bed and may be turned upside down, so that the lug will be out of the way when not wanted.

It will be seen from Fig. 1 that the swinging saw-frame as composed of the parts E E F F completely incloses the base and back boards and forms a very steady and reliable guide for the saw at the various angles to which it may be adjusted.

To render my miter-box still more conveniently portable, it is of what is known as the knockdown construction-that is to say, it may be quickly taken to pieces and folded into compact form, as seen in Fig. 2. For this purpose the base A is provided with legs Ct a, which also act as spacing and retaining devices when the back B and base A are placed together in parallel position, as shown in Fig. 2. The separable bars 0 D E F are disconnected and laid within the legs a, which thus act as retainers for the same and also spacers for the two boards, and hooks lat the ends connect one board to the other, so as to make an integral and self-contained package, in which the base and the back form an inclosing case. When set up, the base A and back B are held together by hooks 5.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A knockdown miter-box comprising a bed and back piece, a stationary upright frame made in detachable sections, and a swinging saw-frame made of four rectangular members detachably connected and mounted on vertical pivots on the bed and stationary frame substantially as described.

2. A knockdown miter-box comprising a bed-piece having legs which also form retainers and spacing devices, a separable back piece, hooks for connecting the back piece and base together, and a stationary frame and swinging saw-frame, each made in detachable sections and adapted to be retained inside the legs of the base when the miter-box is folded as described.

3. In a miter-box the combination with a bed, of a rectangular saw-frame extending around the bed and pivoted upon independent concentric pivots above and below the bed and adapted to receive the work between the upper and lower members of the sawframe substantially as shown and described.

4. A miter-box comprising a bed, a rectangular swinging saw-frame mounted on independent vertical pivots above and below said bed, saw-guides vertically adjustable in said saw-frame, said saw-guides being slotted through their upper ends and having enlarged openings near the tops of said slots, and longitudinal clamp-bars sliding in said opening and adapted to be clamped to the back of an ordinary handsaw substantially as described.

5. A knockdown miter-box having detachable parts with its base and back pieces constructed with supporting-legs and hooks, the legs forming spacing-blocks and retainers when the base is inverted and the whole being arranged to form the containingcase when the box is folded substantially as described.

6. In a miter-box, the combination with a bed, of a swinging saw-frame having two pivots, one of which is spaced above the bed and the other of which is under the bed, and supports for said pivots.

7. In a miter-box, the combination with a bed, of a horizontally-swinging saw-frame supported on pivots above and below the bed, the upper pivot being spaced above the bed, and saw-guide blocks slidable vertically in the frame.

8. In a miter-box, a bed having a longitudinal groove, and a stop-gage slidable in said groove and reversible to different ends of the bed.

5). In a miter-box, the combination with a- IIO bed, of a saw-frame swinging on pivots over and under the bed, the upper pivot. being spaced above the bed to admit the work there- 7 under, said frame having vertical bars laterally adjustable to vary the Width of the frame, and saw-guide blocks slidable vertically on said bars.

10. In a. miter-box, the combination with a bed, of a swinging saw-frame comprising a 

